Combined lock and latch.



No. 717,757. PATENTE'D JAN. 6, 1903- L. H. MELLIKIN, COMBINED LOCK AND LATCH.

APPLICATION FILEU MAY 15, 1902- 'NO MODEL. Y 2 SHEETS-SHEET l.

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PATENTBD JAN. 6, 1903.

I L. H. MULLI'KIN.

COMBINED LOCK AND LATCH. APPLICATION FILED my 15, 1902. no 10mm. 2 sums-sum 2.

witnesses PATENT "OFFICE.

LEVIN H. MULLIKIN, OF TRAPPE, MARYLAND.

COMBlNED LOCK AND LATCH.

SPECIFICATION forming part of Letters IE atent No. 717,757, dated January 6, 1903.

Application filed May 15, 1902. Serial No. 107,534. (No model.)

To all whom, it may concern:

Be it known that I, LEVIN H. MULLIKIN, a citizen of the United States, residing at Trappe, Talbot county, Maryland, have invented certain new and useful Improvements in a Combined Lock and Latch, of which the following is a specification.

My invention relates to that class of locks in which there is a sliding knob-operated latch capable of being locked in its projected position and so form a lock.

The objects of my invention are to provide a combined lock and latch in which the latch may be locked through a key mechanism carried by the knobs; also to provide means for preventing removal of the knobs from the knob-spindle when the locking-dog is in position to lock the latch; to provide an improved mechanism for locking and unlocking the latch; to provide a novel knob shank and spindle for the key mechanism; to provide a simple means for reversing the latch. These objects I accomplish by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my improved latch with one-half of the case and one knob removed. Fig. 2 is a horizontal section on line 2 2, Fig. 1, with the latch locked byits dog, one knob and its spindle being broken away. Fig. 4 is a side elevation partly in section and showing the latch projected and locked by its dog. Fig. 5 is a similar view with the latch in its retracted position. Fig. 6 is a detail perspective of the yoke portion'of the latch. Figs. 7 and 8 are detail perspectives of the dog retainer and the dog, respectively. Fig. 9 is a section on the line 9 9,

Fig. 2. Fig. 10 is a transverse section through one knob-shank to show one of the stationary rings with the key-engaging projections or wards. Figs. 11 and 12 are details of the lock-case.

A designates the cylindrical lock-case as a whole, said case being capable of insertion in a round hole bored in the door. The case comprises two longitudinal sections A A each formed on its inner side at the outer end with a recess a, into which recesses fit the lugs or flanges a, formed on opposite sides the plate D. The plate Fig. 3 is a section on line 3 3, Fig. 1.

of a round boss 0. which closes the front end of the case and is formed on the inner side of the face-plateA of the lock. The boss a is formed with'a rectangu larapertu re a which extends through the face-plate for the reception of the latch B, to be presently described. When the sections A A are secured together by the screw a, the face-plate A will be securely heldin place by the interlockingflanges and recesses of ct.

The latch B is beveled as usual and has an open yoke or middle portion 17, connected thereto by means of a shank h, capable of turning so that by first loosening the screw 0. and then turning the face-plate A, with its round boss a for its axis, the latch B will also be turned, and hence its position may be reversed. Thus asimple means for reversing the latch is provided. The rear end of the yoke is provided with the usual arms b ,which engage the two-armed hub c of the tubular knob-spindle C for retraction thereby.

D is an apertured bearing-plate through which the shank b freely passes, and F is the latch-proj ectin g spring, mounted on the shank and hearing at one end against the nose of the latch and at'its inner end bearing against D is provided at the opposite sides with guide-lugs d d, which enter guide-recesses a a formed in the inner walls of the lock-"case.

The hearing-plate D is in rther provided with a slotted arm d which underlies the yoke Z) of the latch and is provided at the rear end with notches d d and an intermediate curved or rounded portion d, and this plate and the arm (1 constitute a retainer to hold the locking arm or dog E in either of its two positions. This locking-dogE is providedat one end with a squared aperture 6, registering with the bore of the tubular knob-spindle the inner side of the yoke'bof the latch B" when moved in one direction, and so look the latch against retraction. I When the lockingdog E is swung 1n the opposite direction, its

too e will pass beyond the shoulder 12 and register with an open or unobstructed space b, and so allow the latch B to be retracted. In being moved across the inner end 01 of the retainer D the toe e of the dog E will force the retainer forward against the action of the spring F until it reaches one of the notches (1 when the spring F will force the retainerD rearwardly, and so cause one or the other of the notches (Z to' engage the toe e and retain the dog in the thrown position.

The section A of the casing is provided with a plate a on the inner side of its rear end, under which plate the dog E works. The slotted arm (1 of the retainer D is further guided by a small antifriction-roller d lying within its slot and mounted on the screw (1, which holds the sections of the lockcase A together.

The tubular knob-spindle O is provided with a longitudinal slot 0, which receives the longitudinal rib c on the interior of the hub c, and thus the hub will be rotated by the spindle. The hub c is provided with a transverse slot 0 through which projects the apertured end of the locking-dog E, and the spindle O is likewise provided with a transverse slot 0 registering with the slot 0 and these two slots allow of the turning of the knob-spindle O and hub 0 without their acting on the dog E.

G G are the centrally-apertured knobs, each having a tubular shank Gr secured at its outer end in said central aperture by means of the annular flanges g and screws g. The bores of the'shanks G are in two diameters, and the outer larger ends of. the bores are provided with longitudinal grooves g while the inner smaller ends of the bores each has a longitudinalrib g These ribs 9 enter the opposite ends of the longitudinal slot 0 of the spindle O and connect the knobs with said spindle for rotation thereby.

H H designate the key-operated spindles which operate the locking-dog E, as will now be described. These key-spindles H H are provided with heads h h, each having a cruciform notch c in its outer face to receive the bits 7: on the end of the key K. The keyspindles H H are further provided with longitudinal grooves h h, extending from their smaller ends to annular grooves h h formed between their ends, and the knob-spindle C is provided on its interior near both ends with small projections 0 which first enter the grooves h h and then the grooves 72 h after the manner of a bayonet-joint, and when these key-spindles H H are so turned as to throw the dog E in its locking position these pins or projections 0 will lie in the annular grooves h 71 out of register with grooves h, and so prevent withdrawal of the knobshanks G In assembling the parts the key-spindles H H are dropped into the larger bores of the knob-shanks, and their heads h will rest on the shoulders formed at the junction of the two bores. The shanks G are now inserted on the ends of the spindle O, and the screws will be passed through threaded apertures g in the knob-shanks and through apertures in the knob-spindle until their points enter the annular grooves h2 72, of the key-spindles H H, which latter are thus swiveled in the knob-shanks for rotation by the keys.

L designates a series of rings dropped into the larger bores of the knob-shanks G in which they are held by the caps g and slotted escutcheon g. A certain number of these rings L are provided with lugs I, which enter the grooves g g of the shanks G and with internal notched projections Z, which correspond in location to the notches 7c in the edges of the key K, so that the spindles H H can only be rotated by a key having notches corresponding with the wards or projections Z, as will be readily understood.

The connection of the key-spindles H H with the locking-dog E is as follows: One spindle, H, is squared at its inner end, as shown at 71 and passes through the squared aperture in the dog, and the other spindle, H, has a square socket h in its inner end, into which the squared end 71 projects extensibly, but is held from rotation. Thus rotary motion of either key-spindle H H will cause the dog E to be operated tolock the latch B or release it, as heretofore described.

- The operation, briefly described, is as follows: When the dog E is turned by the key K through either of the spindles H H to bring its toe e into the path of the shoulder b the latch B cannot be retracted by the rotation of the knobs G G; but when the toe e is thrown out of the path of the projection b the latch is free to be released by the knobs or when striking the lock-strike of the doorjamb.

The knobs may of course be formed integral with their shanks, if so desired.

The object in having the cruciform notch c is to always have one notch in position to receive the key either when the spindle H is turned to throw the dog into its locking or unlocking position and also allow of the removal of the key in any position of the spindle.

What I claim is 1. A combined lock and latch comprising a latch, a hub connected with the latch for retracting it, a tubular knob-spindle connected with the hub, a locking-dog movable into and out of the path of the latch, knobs having shanks connected with the said knob-spindle, and key-operated spindles mounted in the knob-shanks and operatively connected at their inner ends with the said locking-dog to throw it into and out of operative position.

2. A combined lock and latch comprising a latch, a hub connected with the latch for retractin g it, a tubular knob-spindle connected with the hub, a locking-dog movable into and out of the path of the latch, a yielding retainer to hold the dog when thrown in either extreme position, knobs having shanks connected with the said knob-spindle, and keyoperated spindles mounted in the knob shanks and operatively connected at their inner ends with the said locking-dog to throw it into and out of its operative positions.

3. A combined lock and latch comprising a sectional casing, a screw holding the sections together, alatch having an operating mechanism, a locking-dog, means for throwing the dog into and out of the pathof the latch, a yielding retainer for said dog having a slotted member through which said screw passes, and an antifriction-roller on the screw within the slot and forming a roller-bearing for said:

retainer, substantially as described.

4. A combined lock and latch comprising a latch having knob-spindle connected with the hub for operatingit, a locking-dog for the latchextending through the hub into the spindle, knobs connected with the spindle and provided within their shanks with key-actuated spindles operatively connected with the said locking-dog, and a series of rings in the knobshanks beyond the key-spindles, certain of the rings having internal projections to register with notches in a key.

5. A combined lock and latch comprising a latch and its tubular operating knob-spindle, a locking-dog for the latch extending into the knob-spindle, knobs connected with the knobspindle, key-operated spindles in the shanks of the knobs and operatively connected with said dog, and interlocking connections between the key-spindles and knob-spindle to prevent removal of the knob-shanks from their spindle while the key-operated spindles are in their locking positions.

6. The combination with the latch and slotted tubular operating knobspindle, of a locking-dog for the latch extending into the bore of the knob-spindle, knobs having tubular shanks provided with internal ribs entering the ends of the slot in the knob-spindle, keyoperated spindles provided with annular grooves and connected with the ends of the i said locking-dog to throw it into and out of the path of the latch, retaining-screws passed through registering apertures in the knobshanks and knob-spindle and into the annular grooves of the key-operated spindles.

7. The combination with the latch and its an operating-hub, a tubular slotted tubular operating knob-spindle having pins or projections on its interior, of a locking-dog for the latch extending into the bore of the knob-spindle,knobs having shanks with bores in two diameters, key-actuated spindles having heads at their outer ends engaging the shoulders formed by the juncture of said bores; the inner adjacent ends of the spindles being operatively connected with the end of the locking-dog to throw it into and out of the path of the latch, and said keyspindles being further provided with longitudinal grooves to receive the said pins or projections on the knob-spindle and with annular grooves to finally receive said pins or projections, ribs within the smaller end of the knob-shank bores entering the end of the knob-spindle slot, and screws passed through registering apertures in the knob-shank and knob-spindle and into the annular grooves in the key-operated spindle.

8. The combination with the latch and its tubular knob-spindle, of a locking-dog for the latch projecting into the said spindle and there 4 having a squared aperture; knob-shanks connected to the ends of the said spindle, and key-operated spindles mounted in the knobshanks, the inner end of one of said spindles being squared and passed through the aperture in the locking-dog and the inner end of the other key-spindle being provided with a squared socket receiving the squared end of the other key-spindle.

9. The combination with-the latch and its tubular operating knob-spindle, of the locking-dog movable into and out of the path of the latch, a key-operated spindle within the knob-shank, connected at its inner end with said dog and provided at its outer end with a cruciform key-receiving notch, and series of rings in front of the notched end of the spindle, substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

LEVIN H. MULLIKIN.

Witnesses:

PERCIVAL MULLIKIN, W. S. WILSON. 

